|Intelligent Gradient Detection on MPPT Control for VariableSpeed Wind Energy Conversion System|
The problem of control associated wind energy conversion systems using horizontal-axis fixed-pitch variable speed low-power, working in the partial load region, consisting in the energy conversion maximization, is approached here under the assumption that the wind turbine model and its parameters are poorly known. Intelligent gradient detection method by using Maximum Power Point Tracking (MPPT) fuzzy control approach is proposed control solution aims at driving the average position of the opera...
Keywords: MPPT; wind energy; optimal control; WECS
|Centralized Optimal Control for a Multimachine Power System Stability Improvement Using Wave Variables|
This paper introduces the application of wave variable method in reducing the effect of delay during the transmission of control signals via large distances in a multimachine power system. Fast response and pure control signals applied to a power system have great importance in control process. At first we design a centralized optimal control considering no transport delay and then we compare them to the one considering this effect in order to demonstrate the deteriorating effect of transmission...
Keywords: Centralized optimal control; delay; multimachine; wave variable
|Rocket booster control. section 4- a sufficient condition in optimal control - Lee, E. B|
Pontryagin maximum principle - sufficient and necessary condition for optimal control
Keywords: BOOSTER ROCKET ENGINES; MAXIMUM PRINCIPLE; OPTIMAL CONTROL; PONTRYAGIN PRINCIPLE; ROCKET ENGINES; OPTIMAL CONTROL; PONTRYAGIN PRINCIPLE
|Optimum control with desired input piece-wise continuous - Haag, F. G.|
Optimum control law utilizing Pontryagin maximum principle
Keywords: CONTROL THEORY; MAXIMUM PRINCIPLE; OPTIMAL CONTROL; PONTRYAGIN PRINCIPLE; OPTIMAL CONTROL; PONTRYAGIN PRINCIPLE
|Realization of minimum control effort optimal control - Craig, A. J.|
Pontryagin optimal principle applied to control system problems where optimization criterion is minimum fuel consumption
Keywords: CRITERIA; FUEL CONSUMPTION; OPTIMAL CONTROL; OPTIMIZATION; PONTRYAGIN PRINCIPLE; FUEL CONSUMPTION; OPTIMAL CONTROL; PONTRYAGIN PRINCIPLE
|Sub-optimal Control Law for Active Magnetic Bearings Suspension - G. Barbaraci, G. VirzÃ¬ Mariotti|
This paper deals with the comparison of three types of sub-optimal control law for the stable levitation of a turbojet shaft, sustained by two radial active magnetic bearings (AMBs). Shaft is considered rigid for the procedure simplification. The utilized approach leads to development of different sub-optimal control laws to use in speed-varying simulations in the angular speed of the shaft. The first control matrix is obtained by explicit relationships of the parameters of the control law vs...
Keywords: Optimal control; Sub Optimal control; Active magnetic bearing; Turbojet shaft; Closed loop
|Rocket booster control. section 14- minimum disturbance effects control of linear systems with linear controllers - Harvey, C. A|
Optimal control problem for linear systems - rocket booster control
Keywords: BOOSTER ROCKET ENGINES; CONTROLLERS; LAUNCH VEHICLES; LINEAR SYSTEMS; OPTIMAL CONTROL; LAUNCH VEHICLE; LINEAR SYSTEM; OPTIMAL CONTROL
|Rocket booster control, section 6. time- optimal bounded phase coordinate control of linear recurrence systems - Lee, E. B|
Rocket booster control - time-optimal bounded phase coordinate control for systems modeled by linear recurrence equations
Keywords: BOOSTER ROCKET ENGINES; ROCKET BOOSTER; COORDINATES; LINEAR EQUATIONS; LINEAR SYSTEMS; OPTIMAL CONTROL; PHASE CONTROL; TIME OPTIMAL CONTROL; LINEAR EQUATION; OPTIMAL CONTROL
|Existence theorems for optimal problems with vector valued cost function - Olech, C|
Existence theorems for optimal control problems with vector valued cost function
Keywords: EXISTENCE THEOREMS; OPTIMAL CONTROL; THEOREM PROVING; EUCLIDEAN GEOMETRY; VECTOR SPACES
|A simple method for estimating redesignation capability in LEM descent - Heap, F|
No Abstract Available
Keywords: EQUATIONS; OPTIMAL CONTROL; FUNCTIONS (MATHEMATICS); INDEPENDENT VARIABLES; LUNAR ORBITAL RENDEZVOUS
|A solution to a countable system of equations arising in Markovian decision processes Technical report no. 89 - Derman, C.|
Optimal rules for controlling Markovian decision processes applied to solutions for problems dealing with ordering inventory supplies
Keywords: DECISION MAKING; OPTIMAL CONTROL; INVENTORIES; INVENTORY CONTROLS; MARKOV PROCESSES; OPTIMAL CONTROL; SUPPLYING; DECISION MAKING; INVENTORY CONTROL; MARKOV PROCESS
|Theory of a class of discrete optimal control systems - Jordan, B. W.|
Discrete optimal control systems for systems described by nonlinear difference equations
Keywords: CONTROL EQUIPMENT; DIFFERENCE EQUATIONS; NONLINEAR EQUATIONS; NONLINEARITY; OPTIMAL CONTROL; CONTROL DEVICE; DIFFERENCE EQUATION; NONLINEAR EQUATION; OPTIMAL CONTROL
|Optimal control of saturating systems with stochastic inputs - Kavanaugh, W. P.|
Optimal control of nonlinear saturating systems with stochastic inputs
Keywords: NONLINEAR SYSTEMS; SATURATION; STOCHASTIC PROCESS; OPTIMAL CONTROL; RANDOM SIGNALS; SATURATION; SPACECRAFT; STOCHASTIC PROCESSES; NONLINEAR SYSTEM; OPTIMAL CONTROL; RANDOM SIGNAL
|Rocket booster control. section 16- a minimax control for a plant subjected to a known load disturbance - Gollwitzer, H. E|
Open loop optimal control problem for plants represented by linear recurrence equations - rocket booster control
Keywords: BOOSTER ROCKET ENGINES; LAUNCH VEHICLES; LINEAR EQUATIONS; LOADS (FORCES); OPTIMAL CONTROL; LAUNCH VEHICLE; LINEAR EQUATION; OPTIMAL CONTROL
|ADAPTIVE STATE VECTOR CONTROL. SECTION 4- THE THEORY OF TIMEOPTIMAL CONTROL OF LINEAR SYSTEMS - Harvey, C. A.|
Adaptive state vector control - theory of time optimal control of linear systems
Keywords: ADAPTIVE CONTROL; DIRECTIONAL CONTROL; LINEAR SYSTEMS; STATE VECTORS; TIME; TIME OPTIMAL CONTROL; ADAPTIVE CONTROL; LINEAR SYSTEM; TIME OPTIMAL CONTROL
|Analog circuits for energy and fuel optimal control of linear discrete systems - Canon, M. D.|
Analog circuits for energy and fuel optimal control of linear discrete systems
Keywords: ANALOG CIRCUITS; OPTIMAL CONTROL; ENERGY; FUEL CONTROL; LINEAR SYSTEMS; OPTIMAL CONTROL; CIRCUIT; ENERGY; FUEL CONTROL; LINEAR SYSTEM
|Investigation of optimization of attitude control systems Annual report, 15 Sep. 1965 - 30 Jun. 1966 - NON|
Optimal control in bounded phase-coordinate processes and for antenna pointing direction subject to random disturbances
Keywords: ATTITUDE CONTROL; DIRECTIONAL ANTENNA; MARKOV PROCESS; OPTIMAL CONTROL; RANDOM VIBRATION; COORDINATES; DIRECTIONAL ANTENNAS; MARKOV PROCESSES; OPTIMAL CONTROL; OPTIMIZATION; RANDOM PROCESSES; RANDOM VIBRATION; COORDINATE SYSTEM
|Some applications of stochastic differential equations to optimal nonlinear filtering - Wonham, W. M|
Application of stochastic differential equations to optimal nonlinear filtering in control theory
Keywords: CONTROL THEORY; OPTIMAL CONTROL; STOCHASTIC PROCESS; DIFFERENTIAL EQUATIONS; NONLINEAR FILTERS; NONLINEAR SYSTEMS; OPTIMAL CONTROL; STOCHASTIC PROCESSES; DIFFERENTIAL EQUATION; FILTER; NONLINEAR SYSTEM
|Optimum Decision Policy For Replacement of Conventional Energy Sources by Renewable Ones|
With the increase of world population and industrial growthof developing countries, demand for energy, in particularelectric power, has gone up at an unprecedented rate overthe last four decades. To meet the demand, electric powergeneration by use of fossil fuel has increased enormouslythereby producing increased quantity of greenhouse gasescontributing more and more to atmospheric pollution which,climate Scientists believe, can adversely affect the globalclimate, and health and welfare of world...
Keywords: Optimization; Mathematical Models; Optimal Control; Optimum Decision Policy; Conventional and Renewable Energy Sources
|[req020net] Optimal Control - Blast off [LP] [relesed by REQ Recordings 26.06.11]|
[req020net] Optimal Control - Blast off [LP] [relesed by REQ Recordings 26.06.11] tracklist: 01 - Optimal Control - Space Trail (Extended) [4:40] 02 - Optimal Control - Starting [1:11] 03 - Optimal Control - The Signal From The Unknown Planet [1:12] 04 - Optimal Control - Electromagnetic Activity From IO [2:33] 05 - Optimal Control - Plastic World [3:19] 06 - Optimal Control - ER208 [1:10] 07 - Optimal Control - Blast off [5:03] 08 - Optimal Control - Electromagnetic activity (Part II) [5:12] 09...
Keywords: req020net; Optimal Control; Blast off [LP]; REQ RECORDINGS; Noise; Dark Ambient; Experimental
|Numerical, Analytical, Experimental Study of Fluid Dynamic Forces in Seals - Walowit, Jed|
The objectives of the program were to develop computational fluid dynamics (CFD) codes and simpler industrial codes for analyzing and designing advanced seals for air-breathing and space propulsion engines. The CFD code SCISEAL is capable of producing full three-dimensional flow field information for a variety of cylindrical configurations. An implicit multidomain capability allow the division of complex flow domains to allow optimum use of computational cells...
Keywords: SATELLITE CONSTELLATIONS; SPACECRAFT MANEUVERS; TETRAHEDRONS; FORMATION FLYING; FUEL CONSUMPTION; TRAJECTORY OPTIMIZATION; OPTIMAL CONTROL
|Laser net - A system for monitoring wingtip vortices on runways - Funk, B. H.|
Laser system for monitoring wingtip vortices on runways
Keywords: AIR TRAFFIC CONTROL; CRITERIA; OPTIMAL CONTROL; AIRSPACE; ALGORITHMS; COSTS; RUNWAYS; SET THEORY
|Numerical nonlinear inelastic analysis of stiffened shells of revolution. Volume 2: User's manual for STARS-2P digital computer program - Svalbonas, V.|
The information necessary for application of the STARS-2P (shell theory automated for rotational structures-2(plasticity)) program is presented. This addition to the STARS system of programs retains the basic fractures characteristic of the system. For vol. 1, see N75-27419.
Keywords: DYNAMIC MODELS; SCALE MODELS; COMPUTER PROGRAMMING; DECISION MAKING; OPTIMAL CONTROL; STOCHASTIC PROCESSES
|Development of a Model for the Night Side Magnetopause Using Global Simulations - Raeder, Joachi|
During the investigation we have finalized the event studies that are necessary for the development of the magnetopause model and for the calibration of our simulation code.
Keywords: ACTUATORS; FERROMAGNETIC MATERIALS; MAGNETOSTRICTION; OPTIMAL CONTROL; NONLINEARITY; PERTURBATION; MAGNETOMECHANICS (PHYSICS); CONTROL THEORY; CHARACTERIZATION; HYSTERESIS
|Upper atmosphere pollution measurements (GASP) - Rudey, R. A.|
The environmental effects are discussed of engine effluents of future large fleets of aircraft operating in the stratosphere. Topics discussed include: atmospheric properties, aircraft engine effluents, upper atmospheric measurements, global air sampling, and data reduction and analysis
Keywords: CONTROL THEORY; DYNAMIC MODELS; SCALE MODELS; DECISION THEORY; HIERARCHIES; OPTIMAL CONTROL; STOCHASTIC PROCESSES
|Rotational temperature measurements 300 deg K to 1000 deg K with electron beam probe - Hunter, W. W., Jr|
Laboratory measurements of rotational temperatures in static low density air with electron beam probe
Keywords: LINEARITY; OPTIMAL CONTROL; TRAJECTORY OPTIMIZATION; CONSTRAINTS; HAMILTONIAN FUNCTIONS; LINEAR PROGRAMMING; MATRICES (MATHEMATICS)
|Vapor phase growth system and its use in the preparation of several III-V compound semiconductors - Enstrom, R. E.|
Vapor phase growth and properties of semiconductor materials
Keywords: FLIGHT CONTROL; FLIGHT OPTIMIZATION; VARIATIONAL PRINCIPLES; AERODYNAMIC CHARACTERISTICS; AIRCRAFT; OPTIMAL CONTROL; ROCKET VEHICLES; SYSTEMS ENGINEERING
|Electromagnetic damper system for ground wind load studies - Scott, L. P|
The design, fabrication, and adaptation of a model damper system to the 5.5% aeroelastic model of the Saturn 1B/Skylab launch vehicle are reported. The damper is dynamically calibrated over the desired range of additive damping for model conditions prior to wind tunnel testing.
Keywords: OPTIMAL CONTROL; SPACECRAFT CONTROL; TRAJECTORY CONTROL; DIFFERENTIAL EQUATIONS; EQUATIONS OF MOTION; THRUST VECTOR CONTROL; TRAJECTORY OPTIMIZATION
|A sensitivity equation and its use in optimal control theory - Armstrong, E. S|
No Abstract Available
Keywords: COMPUTER NETWORKS; OPERATIONAL PROBLEMS; OPTIMIZATION; ROUTES; SWITCHING CIRCUITS; ECONOMIC FACTORS; NETWORK SYNTHESIS; OPTIMAL CONTROL
|OBSERVATIONS BY ARTIFICIAL SATELLITES AND PROBES - YERPYLEV, N. P., et al|
A COMPILATION OF ARTIFICIAL EARTH SATELLITES AND SPACE PROBES LAUNCHED FROM JANUARY 1, THROUGH DECEMBER 31, 1970 IS PRESENTED. TABLES OF DATA ARE PROVIDED WHICH SHOW THE COUNTRY WHICH LAUNCHED THE SATELLITE, THE DESIGNATION, THE DATE OF LAUNCH AND LENGTH OF EXISTENCE, SLOPE OF THE ORBIT TO THE EQUATOR, THE PERIOD, AND THE PERIGEE AND APOGEE OF THE ORBITS.
Keywords: AIRCRAFT STABILITY; DAMPING; ROTARY STABILITY; STOCHASTIC PROCESSES; AERODYNAMIC STABILITY; MARKOV PROCESSES; OPTIMAL CONTROL; STATISTICAL ANALYSIS
|Characterization of typical platelet injector flow configurations - Hickox, C. E|
A study to investigate the hydraulic atomization characteristics of several novel injector designs for use in liquid propellant rocket engines is presented. The injectors were manufactured from a series of thin stainless steel platelets through which orifices were very accurately formed by a photoetching process. These individual platelets were stacked together and the orifices aligned so as to produce flow passages of prescribed geometry...
Keywords: CONFERENCES; DYNAMIC RESPONSE; SCALE MODELS; CONTROL THEORY; DECISION MAKING; OPTIMAL CONTROL; SIMULATION
|Designing Domain-Specific HUMS Architectures: An Automated Approach - Mukkamala, Ravi|
The HUMS automation system automates the design of HUMS architectures. The automated design process involves selection of solutions from a large space of designs as well as pure synthesis of designs. Hence the whole objective is to efficiently search for or synthesize designs or parts of designs in the database and to integrate them to form the entire system design. The automation system adopts two approaches in order to produce the designs: (a) Bottom-up approach and (b) Top down approach...
Keywords: AUTOMATIC CONTROL; MARKOV PROCESSES; ALGORITHMS; ROVING VEHICLES; SCHEDULING; POLICIES; PLANETARY SURFACES; OPTIMAL CONTROL; LOADS (FORCES)
|Status of high power technology for educational satellites - Kuhns, P. W|
Status of high power technology for educational satellites and recommendations for expansion to rural and remote areas
Keywords: COMPUTER PROGRAMS; SPACE SHUTTLES; SPACECRAFT GUIDANCE; TRAJECTORY OPTIMIZATION; FLIGHT PATHS; LIFT DRAG RATIO; OPTIMAL CONTROL
|Automatic Control Systems - Benjamin C. Kuo|
Benjamin C. Kuo Automatic Control Systems ( 3rd.ed.) Prentice-Hall Inc. 1975 Acrobat 7 Pdf 24.1 Mb. Scanned by artmisa using Canon DR2580C + flatbed option
Keywords: Electronics; Feedback; Laplace; Matrix; Transfer Function; State Variable; Root Locus; Stability; Optimal Control; Design
|MODAL COUPLING PROCEDURES ADAPTED TO NASTRAN ANALYSIS OF THE 1/8-SCALE SHUTTLE STRUCTURAL DYNAMICS MODEL. VOLUME 1: TECHNICAL REPORT - ZALESAK, J|
A DYNAMIC SUBSTRUCTURING ANALYSIS, UTILIZING THE COMPONENT MODES TECHNIQUE, OF THE 1/8 SCALE SPACE SHUTTLE ORBITER FINITE ELEMENT MODEL IS PRESENTED. THE ANALYSIS WAS ACCOMPLISHED IN 3 PHASES, USING NASTRAN RIGID FORMAT 3, WITH APPROPRIATE ALTERS, ON THE IBM 360-370. THE ORBITER WAS DIVIDED INTO 5 SUBSTRUCTURES, EACH OF WHICH WAS REDUCED TO INTERFACE DEGREES OF FREEDOM AND GENERALIZED NORMAL MODES...
Keywords: CONTROLLABILITY; LINEAR SYSTEMS; OPTIMAL CONTROL; CONTROL STABILITY; DECISION MAKING; EQUATIONS OF STATE; FEEDBACK CONTROL
|Residual stress alleviation of aircraft metal structures reinforced with filamentary composites - Kelly, J. B.|
Methods to eliminate or reduce residual stresses in aircraft metal structures reinforced by filamentary composites are discussed. Residual stress level reductions were achieved by modifying the manufacturing procedures used during adhesive bonding. The residual stress alleviation techniques involved various forms of mechanical constraint which were applied to the components during bonding. Nine methods were evaluated, covering a wide range in complexity...
Keywords: DESCENT TRAJECTORIES; ITERATIVE SOLUTION; TRAJECTORY OPTIMIZATION; ALGORITHMS; BOUNDARY VALUE PROBLEMS; GRADIENTS; MESH; OPTIMAL CONTROL; SPACING
|Space Shuttle Aerothermodynamics Technology Conference. Volume 4: Operational flight mechanics - NON|
Proceedings of conference on space shuttle aerothermodynamics with emphasis on operational flight mechanics - Vol. 4
Keywords: MATHEMATICAL MODELS; OPTIMAL CONTROL; SMOOTHING; STOCHASTIC PROCESSES; CONTROL THEORY; MAXIMUM PRINCIPLE; NONLINEAR FILTERS; PONTRYAGIN PRINCIPLE
|Unstructured-grid methods development for unsteady aerodynamic and aeroelastic analyses - Batina, John T.|
The current status of unstructured grid methods development in the Unsteady Aerodynamics Branch at NASA-Langley is described. These methods are being developed for unsteady aerodynamic and aeroelastic analyses. The flow solvers are highlighted which were developed for the solution of the unsteady Euler equations and selected results are given which show various features of the capability. The results demonstrate 2-D and 3-D applications for both steady and unsteady flows...
Keywords: AERODYNAMIC DRAG; CIRCULAR CYLINDERS; OPTIMAL CONTROL; OSCILLATIONS; ROTATING CYLINDERS; ROTATION; AERODYNAMIC COEFFICIENTS; TIME DEPENDENCE
|The scattering matrix of a general interconnection of multipoles - Abele, T.-A|
Scattering matrix theory of interconnection of multipoles
Keywords: ALGORITHMS; MARS SURFACE; ROUTES; UNMANNED SPACECRAFT; AIRBORNE/SPACEBORNE COMPUTERS; COMPUTER PROGRAMS; OPTIMAL CONTROL; TERRAIN
|Development of heavy gage bonded honeycomb - NON|
No Abstract Available
Keywords: FEEDBACK CONTROL; NONLINEAR SYSTEMS; OPTIMAL CONTROL; APPROXIMATION; HAMILTON-JACOBI EQUATION; PERFORMANCE PREDICTION; TIME DEPENDENCE
|Flexible All-Digital Receiver for Bandwidth Efficient Modulations - Gray, Andrew|
An all-digital high data rate parallel receiver architecture developed jointly by Goddard Space Flight Center and the Jet Propulsion Laboratory is presented. This receiver utilizes only a small number of high speed components along with a majority of lower speed components operating in a parallel frequency domain structure implementable in CMOS, and can currently process up to 600 Mbps with standard QPSK modulation...
Keywords: REUSABLE LAUNCH VEHICLES; EIGENVALUES; OPTIMAL CONTROL; STABILITY; DECOUPLING; ANGULAR VELOCITY; X-33 REUSABLE LAUNCH VEHICLE; LINEAR SYSTEMS; DIFFERENTIAL EQUATIONS; ERRORS
|The effect of substrate structure on the deposition of evaporated carbon - Fischbach, D. B|
Effect of substrate structure on deposition of evaporated carbon
Keywords: ALGORITHMS; PROBLEM SOLVING; TRAJECTORY CONTROL; OPTIMAL CONTROL; TRANSFER ORBITS; APPLICATIONS OF MATHEMATICS; COMPUTER PROGRAMMING; CONSTRAINTS; DISCRETE FUNCTIONS; DYNAMIC PROGRAMMING; NONLINEARITY
|Parametric analysis report: High temperature solar thermal receiver - NON|
A comparison of concept capabilities within the range of interest shows the optimal receiver to be a windowed matrix receiver. The design offers the probability of low production cost, low risk, and compatibility with the most likely identified application, the powering of an advanced (ceramic) Brayton engine to 2600 F. The design permits optional installation of additional thermal buffering mass or a hybrid burner behind the receiver matrix...
Keywords: APPROXIMATION; OPERATORS (MATHEMATICS); OPTIMIZATION; DIFFERENTIAL EQUATIONS; HEREDITY; NONLINEAR EQUATIONS; OPTIMAL CONTROL; SPLINE FUNCTIONS; CONVERGENCE; FUNCTIONALS; NONLINEAR EVOLUTION EQUATIONS
|The penetration of porous projectiles in aluminum and plastic targets - Fish, R. H|
Penetration of porous projectiles in aluminium and plastic targets
Keywords: ELECTRIC PROPULSION; OPTIMAL CONTROL; INTERPLANETARY TRAJECTORIES; LOW THRUST; TRAJECTORY ANALYSIS; VARIABLE THRUST; ALGORITHMS; DATA PROCESSING; INTERPLANETARY SPACECRAFT; MISSION PLANNING
|Singular perturbations and minimum fuel space trajectories - Edelbaum, T. N|
Perturbation theory for fuel space trajectory optimization
Keywords: CONTROL THEORY; FEEDBACK CONTROL; OPTIMAL CONTROL; SYSTEMS ENGINEERING; SYSTEMS STABILITY; AUTOMATIC CONTROL; BOUNDARY VALUE PROBLEMS; MULTIPROGRAMMING; PRODUCT DEVELOPMENT
|Load Frequency Control of a Four-Area Power System Using Linear Quadratic Regulator|
In this paper an optimal integral controller is proposed for load frequency control problem of multi-area electrical power system. The design of optimal controller uses modern optimal control theory. A state model of a four-area interconnected power system is developed. Dynamic analyses have been done without controller, with integral controller and with optimal integral controllers using Matlab Simulink-Workspace...
Keywords: Optimal Control; Automatic Generation Control (AGC); Four-Area Power System; Load Frequency Control (LFC); Integral Controller; Area Control Error (ACE)
|Current research on regenerative systems - Bell, N. L.|
Biological and physicochemical reaction systems for regenerative food supply of space flight crew
Keywords: FEEDBACK CONTROL; OPTIMAL CONTROL; SENSITIVITY; AUTOMATIC CONTROL; LINEAR EQUATIONS; SELF ADAPTIVE CONTROL SYSTEMS; SYSTEMS ENGINEERING; TRAJECTORY CONTROL
|Thunderstorm Hypothesis Reasoner - Mulvehill, Alice M|
THOR is a knowledge-based system which incorporates techniques from signal processing, pattern recognition, and artificial intelligence (AI) in order to determine the boundary of small thunderstorms which develop and dissipate over the area encompassed by KSC and the Cape Canaveral Air Force Station. THOR interprets electric field mill data (derived from a network of electric field mills) by using heuristics and algorithms about thunderstorms that have been obtained from several domain specialis...
Keywords: CONTROL STABILITY; MANIPULATORS; SIMULATION; CONTROL SYSTEMS DESIGN; CONTROL THEORY; CONTROLLERS; NONLINEAR SYSTEMS; OPTIMAL CONTROL; RICCATI EQUATION; ALGORITHMS; APPROXIMATION
|Space vehicle thermal rejection system - NON|
A space vehicle thermal heat rejection system utilizes separate optimized heat pipe components for the functions of heat acquisition, heat transport, and heat rejection. A honeycomb panel heat pipe evaporator section performs the function of heat acquisition, and forms a closed thermodynamic system with a dual channel heat pipe transport section, which performs the function of heat transport. A plurality of truss or channel core heat pipe rejection fins form the condensor section, which performs...
Keywords: BOUNDARY VALUE PROBLEMS; SLEWING; CONTROL THEORY; DYNAMIC STABILITY; FLEXIBLE BODIES; LARGE SPACE STRUCTURES; OPTIMAL CONTROL; ALGORITHMS; CONTROLLERS; DEGREES OF FREEDOM
|Axial-Force Reduction by Interference Between Jet and Neighboring Afterbody - Pitts, William C.|
Experimental results are presented for an exploratory investigation of the effectiveness of interference between jet and afterbody in reducing the axial force on an afterbody with a neighboring jet. In addition to the interference axial force., measurements are presented of the interference normal force and the center of pressure of the interference normal force. The free-stream Mach number was 2.94, the jet-exit Mach number was 2.71, and the Reynolds number was 0.25 x 10, based on body diameter...
Keywords: CONTROL SYSTEMS DESIGN; ERRORS; FEEDBACK CONTROL; OPTIMAL CONTROL; CONTROLLERS; LOOP TRANSFER FUNCTIONS; NONLINEARITY; SAMPLED DATA SYSTEMS; AUTOMATIC PILOTS; AIRFRAMES